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Friday September 3, 2010 (Test 1 ) Substitute

Friday September 3, 2010 (Test 1 ) Substitute. Bell Ringer. Friday, 9/3/10. No Bell Ringer Today. Announcements. You should now have your Science Binder with its Table of Contents and all of the paperwork that you have received put into it.

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Friday September 3, 2010 (Test 1 ) Substitute

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  1. FridaySeptember 3, 2010(Test 1)Substitute

  2. Bell Ringer Friday, 9/3/10 No Bell Ringer Today

  3. Announcements • You should now have your Science Binder with its Table of Contents and all of the paperwork that you have received put into it. • As soon as you have your ID, please fill out the yellow paper and get your laptop.

  4. Test 1 • Policies and Procedures, Safety, Basic Lab Procedures, Scientific Method, Measurement

  5. Bell Ringer ??????, ??????? • Which of the following conclusions is supported by these data? • Alertness is directly related to level of distraction. • Shuffling methods can affect alertness. • Alertness levels vary during the day. • Long periods of rest improve alertness.

  6. Class Discussion Dimensional Analysis Metric Conversions

  7. Bell Ringer9-1-09 Please take out a blank sheet of paper and title it Bell Ringers – Week of 8/31/09 Look at the front board to see how you should continue with this sheet. Write and solve the following problems under today’s date: 1.00 foot = ? mm 6 quarts = ? kL 4300 g = ?kg

  8. Class Discussion Scientific Notation Significant Figures

  9. Bell Ringer9-2-09 Please take out your Bell Ringer sheet. Bell Ringers – Week of 8/31/09 Look at the front board to see how you should continue with this sheet. Write and solve the following problems under today’s date: Scientific Notation and Sig Figs? 0.0009465000 1 234 765 000

  10. Class Discussion Graphs

  11. Bell Ringer9-3-09 Put under today’s date: Analyze the graph

  12. Bell Ringer9-4-09 Put under today’s date: How much liquid is in each graduated cylinder?

  13. Precision vs. Accuracy • Precision and accuracy are not the same thing. • Accuracy indicates how close you come to the actual or known value. • Precision refers to: • the number of decimal places that you can report a number to with certainty. • Or, the ability to obtain the same result over and over again. • Example: The TV weather forecaster says that it will be between 40 and 60 degrees today. The actual reading turns out to be 53. Thus, the forecast was accurate, but not very precise. The forecaster provided a true statement but without enough detail for us to make plans. For tomorrow, the forecast is 52.47 degrees at 4 PM. It turns out to be 61 degrees. This forecast was very precise, but completely inaccurate. • So what good is one without the other? Not much! • The above examples show that precision is useless without accuracy, but that accuracy with little precision does not tell much either.

  14. Precision vs. Accuracy

  15. Precision

  16. Percent Error

  17. Bell Ringer9-8-09 Put under today’s date: No Bell Ringer Today.

  18. Bell Ringer9-9-09 Put under today’s date: Make the following calculation: 234.76 mm + 54.65 cm =

  19. Bell Ringer9-10-09 No Bell Ringer Today Pick up a calculator and a Scantron (blue side) on your way in. Take out all of the Reference Sheets that you want to use on today’s test. You need a pencil.

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